workup.jp - robtex.com
workup.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.243.83🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3573.sakura.ne.jp | ||||||
| NS | workup.jp ⭐ | ||||||
| A | 49.212.243.83🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3573.sakura.ne.jp | ||||||
| NS | dns01.muumuu-domain.com | ||||||
| A | 202.239.23.39🇯🇵 IDC202.239.23.0/24 Frontier Inc. | ||||||
| NS | dns02.muumuu-domain.com | ||||||
| A | 160.251.249.62🇯🇵 GMOOSK-NET160.251.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| MX | workup.jp ⭐ | ||||||
| A | 49.212.243.83🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3573.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www3573.sakura.ne.jp mx include:_spf1.ocnk.net include:mdmalta.maild... | ||||||
| SOA | workup.jppostmaster@workup.jp serial=1690362757 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1778310903 | ||||||
NS for
workup.jp |
MX for
workup.jp |
Subdomains
www.workup.jp |
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
●NSdns01.muumuu-domain.com2026-04-02 → 2026-05-09 · 3 obs
● 2026-04-02 02:49:16
● 2026-05-09 07:41:36
●NSdns02.muumuu-domain.com2026-04-02 → 2026-05-09 · 3 obs
● 2026-04-02 02:49:16
● 2026-05-09 07:41:36
○NSmaster.dns.ne.jp2015-07-01 → 2016-07-13 · 4 obs
● 2016-07-13 02:06:40
○ 2026-04-02 02:49:16
○ 2026-05-09 07:41:36
○NSns1.dns.ne.jp2015-07-01 → 2016-07-13 · 4 obs
● 2016-07-13 02:06:40
○ 2026-04-02 02:49:16
○ 2026-05-09 07:41:36
○NSns2.dns.ne.jp2015-07-01 → 2016-07-13 · 4 obs
● 2016-07-13 02:06:40
○ 2026-04-02 02:49:16
○ 2026-05-09 07:41:36
●NSworkup.jp2026-04-02 → 2026-05-09 · 3 obs
● 2026-04-02 02:49:16
● 2026-05-09 07:41:36
●MXworkup.jp2015-07-01 → 2026-05-09 · 2 obs
● 2026-05-09 07:41:36
●A49.212.243.832015-07-01 → 2026-05-09 · 2 obs
● 2026-05-09 07:41:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | c.dns.jp, f.dns.jp, a.dns.jp, d.dns.jp... | - |
| workup.jp | dns01.muumuu-domain.com, dns02.muumuu-domain.com | - |
✅ Authoritative Response
Server:160.251.249.62
NS records: dns01.muumuu-domain.com, dns02.muumuu-domain.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for workup.jp (unsigned zone)
⏱️ Timing
Total: 1313ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.243.83 |
| NS | 2 | dns02.muumuu-domain.com, dns01.muumuu-domain.com |
| MX | 1 | workup.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www3573.sakura.ne.jp mx include |
| SOA | 1 | workup.jp postmaster.workup.jp |
Analysis
Hierarchy
www.workup.jp has workup.jp as its parent.
Name Server Role
workup.jp serves as a name server for workup.jp.
dns01.muumuu-domain.com and dns02.muumuu-domain.com are commonly used as name servers together with workup.jp.
Mail Server Role
The mail server for workup.jp is workup.jp.
IP Addresses
workup.jp maps to IP address 49.212.243.83.
Other host names, for instance mx.us-onlinestore.com, alluredesign.jp, mail.laissepasse.jp, www3573.sakura.ne.jp and customproduce.com share IP numbers with workup.jp.
Name Servers
workup.jp is delegated to three name servers: workup.jp, dns01.muumuu-domain.com and dns02.muumuu-domain.com.
workup.jp at least partially shares name servers with other domains such as qpn.jp, hein.jp, okappi.net, rincle.net and tnojima.net.
Host names with a single IP:
workup.jp points to 49.212.243.83
dns01.muumuu-domain.com points to 202.239.23.39
dns02.muumuu-domain.com points to 160.251.249.62
Mail Servers
One mail server serves workup.jp.